Here's an Idea...

How about getting some security software for the software that is in cars today.

With a Wi-Fi connection in your car makes you vulnerable to being hacked, so do we have a Firewall for the car?

Of course they do, it's in-between the engine and the driver, not that firewall, a FIREWALL???

You should have an app that shows who is on your network and can lock down to only those users.